Rename media files using data in ID3 tags

id3-mover.sh

#!/bin/bash

# Examines id3 tages of files in given directory and moves them
# to $TOPDIR, renaming path and file to match "artist/album/track - title.ext"
# - if album is absent: "artist/track - title.ext"
# - if track is absent: "artist/album/title.ext"
# - if title is absent: "artist/album/filename"

TOPDIR="$HOME/Music"

for arg in "${@}"; do
	case "$arg" in
		-t)		NO_TITLE_CHANGE=1;;
		-d)		DRY_RUN=1;;
		*)		FILE="$arg";;
	esac
done

title=`kid3-cli -c 'get title' "$FILE" | awk '{gsub("/","_"); print}'`
if [ -z "$title" ] || [ $NO_TITLE_CHANGE ]; then
	name=`basename "$FILE"`
else
	ext=`echo "$FILE" | grep -o -P '\.[^.]*$'`
	name="$title$ext"
	track=`kid3-cli -c 'get track' "$FILE" | grep -o -P '\d+' | head -1`
	if [ ! -z "$track" ]; then name=`printf "%02d - $name" "$track"`; fi
fi

artist=`kid3-cli -c 'get artist' "$FILE" | awk '{gsub("/","_"); print}'`
if [ -z "$artist" ]; then echo "ERR: NO ARTIST"; exit 1; fi
album=`kid3-cli -c 'get album' "$FILE" | awk '{gsub("/","_"); print}'`
dir="$artist"
if [ ! -z "$album" ]; then dir="$dir/$album"; fi

dest="$TOPDIR/$dir/$name"
if [ $DRY_RUN ]; then
	echo "DRY RUN MOVE TO $dest"
elif [ -e "$dest" ]; then
	echo "ERR: FILE EXISTS $dest"
	exit 3
else
	# move file
	echo "mkdir -p \"$TOPDIR/$dir\""
	mkdir -p "$TOPDIR/$dir"
	echo "mv \"$FILE\" \"$dest\""
	mv "$FILE" "$dest"
fi